python · corona10 · Nov 16, 2021 · corona10 · Nov 16, 2021 · corona10
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
@@ -2017,6 +2024,23 @@ time_exec(PyObject *module)
        utc_string = tm.tm_zone;
 #endif

+#if defined(MS_WINDOWS)
+    if ((LONG)timer_flags == -1) {
-    if ((LONG)timer_flags == -1) {
+    if (timer_flags == (DWORD)-1) {
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
+  #define CREATE_WAITABLE_TIMER_HIGH_RESOLUTION 0x00000002
+#endif
+
+static DWORD timer_flags = -1;
-static DWORD timer_flags = -1;
+static DWORD timer_flags = (DWORD)-1;
diff --git a/Misc/NEWS.d/next/Library/2021-10-25-01-22-49.bpo-45429.VaEyN9.rst b/Misc/NEWS.d/next/Library/2021-10-25-01-22-49.bpo-45429.VaEyN9.rst
@@ -0,0 +1,3 @@
+On Windows, :func:`time.sleep` now uses a waitable timer which supports
+high-resolution timers without increasing the timer frequency if possible.
-high-resolution timers without increasing the timer frequency if possible.
+high-resolution timers.
diff --git a/Doc/whatsnew/3.11.rst b/Doc/whatsnew/3.11.rst
@@ -272,6 +272,10 @@ time
  a resolution of 1 millisecond (10\ :sup:`-3` seconds).
  (Contributed by Benjamin Szőke and Victor Stinner in :issue:`21302`.)

+* On Windows, :func:`time.sleep` now uses a waitable timer which supports high-resolution timers.
+  In Python 3.10, the best resolution was 1 ms, from Python 3.11 it's now smaller than 1 ms.
	if ((LONG)timer_flags == -1) {
	if (timer_flags == (DWORD)-1) {
	static DWORD timer_flags = -1;
	static DWORD timer_flags = (DWORD)-1;
		@@ -0,0 +1,3 @@
		On Windows, :func:`time.sleep` now uses a waitable timer which supports
		high-resolution timers without increasing the timer frequency if possible.
	high-resolution timers without increasing the timer frequency if possible.
	high-resolution timers.